College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, PR China.
College of Life and Environmental Sciences, Minzu University of China, Beijing, 100081, PR China; Beijing Food and Environmental Health Engineering Center, Beijing, 100081, PR China.
Chemosphere. 2021 Oct;280:130586. doi: 10.1016/j.chemosphere.2021.130586. Epub 2021 Apr 28.
Air, crop, and rhizosphere soil samples were collected from e-waste dismantling areas in Taizhou City (Zhejiang Province, China). The mean PBDEs (Polybrominated diphenyl ethers) concentrations in air in the Fengjiang and Binhai areas were 27.8 and 25.1 pg m, respectively (no significant difference, P > 0.05). The mean PBDE concentrations in rhizosphere soil from Fengjiang and Binhai were 9.19 × 10 and 1.34 × 10 pg g dry weight, respectively (no significant difference, P > 0.05). The mean PBDE concentrations in the crop samples from Fengjiang and Binhai were 1.38 × 10 and 6.64 × 10 pg g dry weight, respectively (no significant difference, P > 0.05). PBDEs with≥6 bromine atoms (BDEs-153, -154, -183, and -190) were not translocated from the crop roots to other tissues. PBDEs were taken up by crops selectively. The root epidermis effectively prevented PBDEs from entering edible crop parts and kept the PBDE concentrations in edible roots low. PBDEs with≤5 bromine atoms (BDEs-15, -28, -47, -66, -85, -99, and -100) were selectively enriched from the rhizosphere soil into crop roots, but PBDEs with more bromine substituents were not transferred from the rhizosphere soil to the crop roots. PBDEs with≥6 bromine atoms were selectively enriched from the atmosphere into crop leaves. Crop roots and leaves took up PBDEs with ortho bromine substituents more readily than PBDEs with meta bromine substituents because the octanol-water partition coefficients are lower for ortho-brominated than meta-brominated PBDEs.
空气、作物和根际土壤样品均取自中国浙江省台州市电子废物拆解区。封江和滨海地区空气样本中 PBDEs（多溴联苯醚）的平均浓度分别为 27.8 和 25.1 pg m（无显著差异，P>0.05）。封江和滨海地区根际土壤中 PBDEs 的平均浓度分别为 9.19×10和 1.34×10 pg g 干重（无显著差异，P>0.05）。封江和滨海地区作物样本中 PBDEs 的平均浓度分别为 1.38×10和 6.64×10 pg g 干重（无显著差异，P>0.05）。具有≥6 个溴原子的 PBDE（BDE-153、BDE-154、BDE-183 和 BDE-190）不会从作物根部转移到其他组织。PBDEs 被作物选择性吸收。根表皮有效地阻止了 PBDEs 进入可食用作物部分，并保持了食用根中的 PBDE 浓度较低。具有≤5 个溴原子的 PBDE（BDE-15、BDE-28、BDE-47、BDE-66、BDE-85、BDE-99 和 BDE-100）从根际土壤中选择性地富集到作物根部，但具有更多溴取代基的 PBDE 则不会从根际土壤转移到作物根部。具有≥6 个溴原子的 PBDE 从大气中选择性地富集到作物叶片中。作物根部和叶片比 PBDE 更易吸收邻位溴取代基的 PBDE，因为邻位溴化比间位溴化的 PBDE 具有更低的辛醇-水分配系数。
